To find the most up to date accepted Carrier Codes list first login to your platform and select the tab Reports on the left-hand side.
At the top right-hand corner you'll need to select Report Builder which will popular a drop-down.
Click on the arrow next to Select and another drop-down will populate with the list of possible reports to choose from. Select Approved Carrier Report and then Build Report.
Two columns listing Carrier Name and Accepted Carrier Codes will appear.
If you'd like to export this list you can do so by selecting Export in the top right-hand corner and exporting the excel document named Approved Carrier (.XLS).